| The arrests in 
				the dawn raid, by a counter-terror police squad in the 
				Basaksehir district on the European side of the city, brought 
				the number of people detained in the investigation to 24, it 
				said.
 A police spokesman could not confirm the report, which was also 
				carried by other media.
 
 Three suspected Islamic State suicide bombers killed 44 people 
				in a gun and bomb attack at Istanbul's main airport on Tuesday, 
				the deadliest in a string of attacks in Turkey this year.
 
 The suspected suicide bombers were Russian, Uzbek and Kyrgyz 
				nationals, a Turkish government official said on Thursday.
 
 Separately, security forces on Wednesday detained four Turkish 
				citizens at the Oncupinar border gate in southeast Turkey on 
				suspicion of membership in a terrorist group, the local 
				governor's office said in a statement.
 
 The four were attempting to return to Turkey from a conflict 
				zone in Syria under Islamic State control, it said.
 
 (Writing by Daren Butler, Editing by David Dolan)
 
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